1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1e2f1bd9f669ecd948a68ded05f8fbd602aa5908b129cccdbaebab1d077ec. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13eddfc4-139e-481a-951b-adf5dd0fd1f7.json and https://artists.proofprofile.net/proofs/artist/13eddfc4-139e-481a-951b-adf5dd0fd1f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c046f5c363e36fd612adbc29f5264169e687db75b3580934c13917fef8a0b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1611001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a44990baa9a2cd22a4101b1c6ed230bf53ba06e284dccb4f1b3891aaffa05. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1414001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27179be30647089f739a6bbe60a81d8bb37c74ada5ae388301feaa95a3e37c87. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bc341f5ad36a15c9d2defa2883dc79b1c9a93208209906eb4007931f97b13f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1811001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39138aff85a27e8186481238b26687fd70e811ec35277b72b35cdd86539cb2b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1706001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97ce82956aad5ae3364ab473ae05c85ddf48a445009f101058f2c51182c297. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f3c7d3b169948265c495072fe551ab94a6ed28b27279b12e58bfdee1d9c41. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1803001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06dd35d344d6c4a0bad5fe83590f6c130084d312016116b89576891940d342f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1804001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea122d8e3eb5bc7ff1a6a79a47a9cbec733cf961144b370f60951c069907e77a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1911001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8957ba1b8926131b7ec9f08546c2036bb61f83f42be98ff544d71ba5f5b8ca12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1833001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8fae07a58957cf130e706a85f0bba17c65ebe2abb5028ee02dd8f2d5631a95. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1828001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97ce82956aad5ae3364ab473ae05c85ddf48a445009f101058f2c51182c297. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9371c65f4586c0457a70a7b5906e1b3e4e1b1f3ee9d93d322b8817b95d4a27d3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB2316001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce671f4dc67aa0d9abd85f3ad8c1579f41a55d75e7e19761ef81c1f6475287b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1840001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be23d63d81ae186cd39aa3e85d076527250b9f85439c126e69723f9f10392f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1836001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddfe7cc607c1f6dbc79958066fd771cc2f4e4898eabb263ba5b1fd88c21f352. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac743159e242947a6a8c6428e1c0e4f78945550f3b10217f0cb15c44c1c25d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1805001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b829fcedfde7d8194c7fafd931959db370d2e2d398dc785883613c6cd8900e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1814001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6e07c1700d4c21460bca52745758c48a7f9bc8494485eac7188dc32e126fe5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1817001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2854d765085031ba10a1f4b765a81ba5d30bcb0bad012418d3cdaeeef4b2cb87. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1820001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4a2bd9db9295a136468f30703204e013d81eb75ae3eade2a08a3a88ca2a9ec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1834001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce671f4dc67aa0d9abd85f3ad8c1579f41a55d75e7e19761ef81c1f6475287b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1840001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cfc47b26311810ef5da67cddcf415596478e252c89b20c865f9d28718e9612. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1904001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0949e6f7dfa9c7cb3386afd3756967bd045548fb822bdb9398bfb34c364bfa52. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWKB1904002.